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19#include <linux/hardirq.h>
20#include <linux/if_vlan.h>
21#include <linux/kernel.h>
22#include <linux/netdevice.h>
23#include <linux/etherdevice.h>
24#include <linux/ethtool.h>
25#include <linux/skbuff.h>
26
27#include "datapath.h"
28#include "vport-internal_dev.h"
29#include "vport-netdev.h"
30
31struct internal_dev {
32 struct vport *vport;
33};
34
35static struct internal_dev *internal_dev_priv(struct net_device *netdev)
36{
37 return netdev_priv(netdev);
38}
39
40
41static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
42 struct rtnl_link_stats64 *stats)
43{
44 struct vport *vport = ovs_internal_dev_get_vport(netdev);
45 struct ovs_vport_stats vport_stats;
46
47 ovs_vport_get_stats(vport, &vport_stats);
48
49
50
51 stats->rx_packets = vport_stats.tx_packets;
52 stats->tx_packets = vport_stats.rx_packets;
53 stats->rx_bytes = vport_stats.tx_bytes;
54 stats->tx_bytes = vport_stats.rx_bytes;
55 stats->rx_errors = vport_stats.tx_errors;
56 stats->tx_errors = vport_stats.rx_errors;
57 stats->rx_dropped = vport_stats.tx_dropped;
58 stats->tx_dropped = vport_stats.rx_dropped;
59
60 return stats;
61}
62
63static int internal_dev_mac_addr(struct net_device *dev, void *p)
64{
65 struct sockaddr *addr = p;
66
67 if (!is_valid_ether_addr(addr->sa_data))
68 return -EADDRNOTAVAIL;
69 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
70 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
71 return 0;
72}
73
74
75static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
76{
77 rcu_read_lock();
78 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb);
79 rcu_read_unlock();
80 return 0;
81}
82
83static int internal_dev_open(struct net_device *netdev)
84{
85 netif_start_queue(netdev);
86 return 0;
87}
88
89static int internal_dev_stop(struct net_device *netdev)
90{
91 netif_stop_queue(netdev);
92 return 0;
93}
94
95static void internal_dev_getinfo(struct net_device *netdev,
96 struct ethtool_drvinfo *info)
97{
98 strcpy(info->driver, "openvswitch");
99}
100
101static const struct ethtool_ops internal_dev_ethtool_ops = {
102 .get_drvinfo = internal_dev_getinfo,
103 .get_link = ethtool_op_get_link,
104};
105
106static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
107{
108 if (new_mtu < 68)
109 return -EINVAL;
110
111 netdev->mtu = new_mtu;
112 return 0;
113}
114
115static void internal_dev_destructor(struct net_device *dev)
116{
117 struct vport *vport = ovs_internal_dev_get_vport(dev);
118
119 ovs_vport_free(vport);
120 free_netdev(dev);
121}
122
123static const struct net_device_ops internal_dev_netdev_ops = {
124 .ndo_open = internal_dev_open,
125 .ndo_stop = internal_dev_stop,
126 .ndo_start_xmit = internal_dev_xmit,
127 .ndo_set_mac_address = internal_dev_mac_addr,
128 .ndo_change_mtu = internal_dev_change_mtu,
129 .ndo_get_stats64 = internal_dev_get_stats,
130};
131
132static void do_setup(struct net_device *netdev)
133{
134 ether_setup(netdev);
135
136 netdev->netdev_ops = &internal_dev_netdev_ops;
137
138 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
139 netdev->destructor = internal_dev_destructor;
140 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
141 netdev->tx_queue_len = 0;
142
143 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
144 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
145
146 netdev->vlan_features = netdev->features;
147 netdev->features |= NETIF_F_HW_VLAN_TX;
148 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
149 eth_hw_addr_random(netdev);
150}
151
152static struct vport *internal_dev_create(const struct vport_parms *parms)
153{
154 struct vport *vport;
155 struct netdev_vport *netdev_vport;
156 struct internal_dev *internal_dev;
157 int err;
158
159 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
160 &ovs_internal_vport_ops, parms);
161 if (IS_ERR(vport)) {
162 err = PTR_ERR(vport);
163 goto error;
164 }
165
166 netdev_vport = netdev_vport_priv(vport);
167
168 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
169 parms->name, do_setup);
170 if (!netdev_vport->dev) {
171 err = -ENOMEM;
172 goto error_free_vport;
173 }
174
175 internal_dev = internal_dev_priv(netdev_vport->dev);
176 internal_dev->vport = vport;
177
178 err = register_netdevice(netdev_vport->dev);
179 if (err)
180 goto error_free_netdev;
181
182 dev_set_promiscuity(netdev_vport->dev, 1);
183 netif_start_queue(netdev_vport->dev);
184
185 return vport;
186
187error_free_netdev:
188 free_netdev(netdev_vport->dev);
189error_free_vport:
190 ovs_vport_free(vport);
191error:
192 return ERR_PTR(err);
193}
194
195static void internal_dev_destroy(struct vport *vport)
196{
197 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
198
199 netif_stop_queue(netdev_vport->dev);
200 dev_set_promiscuity(netdev_vport->dev, -1);
201
202
203 unregister_netdevice(netdev_vport->dev);
204}
205
206static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
207{
208 struct net_device *netdev = netdev_vport_priv(vport)->dev;
209 int len;
210
211 len = skb->len;
212 skb->dev = netdev;
213 skb->pkt_type = PACKET_HOST;
214 skb->protocol = eth_type_trans(skb, netdev);
215
216 netif_rx(skb);
217
218 return len;
219}
220
221const struct vport_ops ovs_internal_vport_ops = {
222 .type = OVS_VPORT_TYPE_INTERNAL,
223 .create = internal_dev_create,
224 .destroy = internal_dev_destroy,
225 .get_name = ovs_netdev_get_name,
226 .get_ifindex = ovs_netdev_get_ifindex,
227 .send = internal_dev_recv,
228};
229
230int ovs_is_internal_dev(const struct net_device *netdev)
231{
232 return netdev->netdev_ops == &internal_dev_netdev_ops;
233}
234
235struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
236{
237 if (!ovs_is_internal_dev(netdev))
238 return NULL;
239
240 return internal_dev_priv(netdev)->vport;
241}
242
